Suspicious Payload Drop to Public User Directory by Gladinet Exploit

ATT&CK techniques

Priv Esc → C2

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
- T1055Process Injection
Defense Evasion
- T1055Process Injection
Cred Access
Discovery
Lateral Movement
Collection
C2
- T1105Ingress Tool Transfer
Exfiltration
Impact

What it detects

This rule detects the files d3d11.dll or Centre.exe being written under the Public user directory, a payload staging behavior observed by Huntress following CVE-2025-30406 exploitation of Gladinet CentreStack. Attackers drop a DLL sideloading component and secondary executable into a world-writable directory to establish execution and persistence. Placement of these named binaries in the Public directory is anomalous and indicates post-exploitation staging.

Reporting behind it

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Suspicious PowerShell Download of Bumblebee Stager Files (via process_creation)

Suspicious Payload Drop to Public User Directory by Gladinet Exploit

Pivot detection · T1105 · 9 related

Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.

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